Coffee percolator



Gv. RATHMAN;

COFFEE PERCOL'ATOR.

APPLICATION FILED IuLY f2, 1921.

v wvdvtoz Patented Feb.

A duomafQ A To all whom t may concern:

UNUED STATESr` "ATENT OFFICE.

.'GBEBTQMTHANQOE lauw` yonx, N. Y., ASSIGNoR or Two-FIFTHS To JAMES L .Y Y BRQWN ANDpoNE-rir'rn TQIJWILLIAM HonGxxNsoN, BOTH or NEW Yonx, N. Y.

"COFFEE PnncoLAToR.

Be'it'lrnown that I, GILBERT'RATHMAN, a citizen of the United States, vand resident of the borough-of Manhattanfcity, county, and State of New York, have `invented 'certain new and useful Improvements in Coffee Percolators, of which the following is a specification. z

This invention relates to improvements in coffee percolators, and more particularly to percolators designed for use vin lunch rooms and restaurants for makingvcoffee in large quantities. Y

The main lobjects ofthe'finvention are to provide simple and eflicient ,means for rapidly circulating the liquid "in the coffee receptaclejthrough the ground coffee in the presence of valves and other working parts usual bag vat the top of theA receptacle rfor the purpose of obtaining yan extract orv infusionof the desired strength; to provide a circulating means so constructed that lthe in the path of the liquid is avoided; and to provide a circulating'means which may be readily cleaned. To these ends the invention consist`s"i'nthevarious features of construction and combinations of elements hereinafter Inore'f'ully'described, and particularly pointed out in the appended claims.

` VIn the drawing: i n

Fig. 1 isa-vertical sectional view of the Y percolator; and

Figf2 a detail vertical sectional view of a part of the coffee extract circulating means on an enlarged scale. v

Referring to the yarious` parts by numerals, 1 designatesrthe outer casingor hot water tankoflthe percolator which is provided with the usual removable cover or top 2, and the inner coffee extract receptacle 3, having the bag 4 for ground coffee supported at the open upper end thereof.

At the bottom of the extractA receptacle 3 is an outlet 5 leading to a T-fitting 6 to one branch of which the inner end of a horizontal discharge pipe 7 is connected. Pipe 7 extends outwardly through the casing 1 and the usual faucet 8 is attached to the outer end of said pipe. The inner end of a horizontal pipe 9 is connected to the other branch of the fitting 6, saidk pipe extending outwardly through casing 1 and havin its outer end screwed in one branch of a -fitx ting 10. Fitting 10 has two aligned vertical branches 11 and 12, Vthe lower branch spcification of Letters raient.

Patented Feb. 7, 1922.

Apparati@ niedjuiyia, 1921. serial No. 484,021.

12v being of greater diameter thanbranch l 11 and having the upper end of well or cylinder 13 screwed therein. The lower end of cylinder 13 is closed by detachable cap `14 ywhich is threaded on said cylinder and is provided with aldrain port 15 leading to a faucet or draincock 16.

A cylinder or pipe 17 of smaller diameter than cylinder v13 extends from a point opposite the upper end of' tank 1 down through fitting 10 and cylinder 13 to point ka short distance above the lower end of' the cylinder 13,"said cylinder 17 having a threaded connection with the branch 11 of fitting 10. The upper end of pipe 17is threaded into one branch of an elbow fitting 18 in the other branch ofwhich is screwed the outer end of a horizontal discharge pipe 19 which extends inwardly through casingA 1 to a point over the coffee bag 4 `and is provided about theair pipe 20 to a point above the lower ends of said pipes 17 and 20. Any suitable means may-be provided for supplying air-under pressureat vwillfto pipe 20. For this -purposelV have shown an air `hose 23connected with the upper end of pipe .201 and leading from the outlet of a fan blower 24 driven by an electric motor'25 which may be started` and stopped at will through the medium of a switch' 126.

It will be obvious that water pou-red into the inner receptacle 3 may be withdrawn from the lower end of said receptacle and discharged into the upper end thereof through the ground-coffee in bag 4 by starting the motor 25 and blower 24 and supplying a blast of air downward through pipe 20. Normally, liquid in receptacle 3 flows through pipe 9 into cylinder13, filling said cylinder and risingin pipe 17 as high as the liquid level in receptacle 3, as shown in Fig. 1. When air under pressure is supplied to pipe 20 it is discharged into the tubular deflector 21 which diverts the blast upwardly within pipe 17.- The air lblast causesthe column of liquid in pipe 17 to rise and discharge through pipe 19 into bag 4 where it passes through the ground coffee back into receptacle 3. A very small motor and blower will supply sufficient air pressure as "a blast of air Vat relatively lowV pressure will be suiicient'to` aerated or filled-,With bubbles and, being thus rendered lighter than the liquid column in cylinder 13, pipe 9 and receptacle `3,the pressure of the latter liquid column will assist the force of the. air blast in elevating the column of aerated liquidk in *y supported vacross the open end of the re' Y pipe 17.

The cover 2 is supplied with oneormore apertures?? for the escape of air. The circulating system may be drained of liquid and sediment through they drain cock V16. It will be observed that the circulating system consists of lengths of straight piping which may be readily disconnected and may be easily cleaned.

point where said pipe passes through the top wallk of the elbow.`

What I claim is: Y

1. The combination with a coffee percola-V tor of repouring meansA comprising a closed well connected with the extract receptacle of the 'percolator and located below the.

level-.of the lower end of said receptacle,

a verticalfpipe depending into said wellan air supply pipe vextending downward `through said vertical pipe, a branch V'pipe leading from said vertical pipe' at a point above the well to a point over the extract vreceptacle ,ofthe percolator, and means for supplying'air under pressure to theupper endl of the air supply pip'e'at will.

2. Coffee ypercolating apparatus comprising any urn havingan extract receptacle therein-open at its upperend, a coffee bag ceptacle, a vertical cylinder having a closed lower end, aY conduitconnecting thelower end of the receptaclewith said cylinder, a vertiealvpipe depending intoV said cylinder to a point adjacent the lower end'of the cylinder,` a pipe. leading: from upper end of said vertical pipe'A to awpoint 'over the eoffeebag "and means-or'vtlischarging air under pressiireinto"saidV vertical picpe adjacent `the lower end thereof.

3. offee percolating apparatus comprising an urnA having anv extract receptacle therein open at its upper end, .ajcoilee bag supported acrossgthe open end of the receptaelega' verticall 'cylinder having a Vclosed lower end, a conduitconnectingjthe lower end of the receptacle with saidcylinder, a

eol

vertical pipe depending into vsaid cylinder to a point adjacent the lower end of.. the'- cylinder, apbranch pipe leading from Vthe Y f upper end of said vertical pipe to a 'point' Vover the coffee. bag, and means for dis-v charging air under pressureat willupwardly within said vertical, pipe vat ay pointY above'k the lowerl end of. said pipe.

4. The Vcombination .with va coffee. per- Y l colator of repouringi means comprisinga Pipe 20 is soldered to elbow 18 at theA closed well connected with the VVextract receptacle ofthe percolator andf located `below the level of the'lower end of ysaidreceptacle, a vertical pipe depending into said well', an air supply pipe f extending .-f downward through .said vertical pipe, Va branch pipe leadinggfromsaid vertlcal pipe at a point abovek the well to .a point over the eX- tract` receptacle l VofV thek percolator,l anda .i

of said well.- f

drain lcock Vconnected with the; lower end `5. The. combination with a coffee `.urn

having an extract receptacle therein open yextending from a point adjacent the lower end of said well to a poi-nt overthe open end vof said receptacle, and means ford-ischarging air under pressureinto ysaid conduit A.at va thereof, l

` In testimony whereoflv hereunto affix Y signature.

GILBERT -RTHMAN- Y point;- adjacent VtheV lower end 

